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A Chinese army spokesman said that military barracks are restricted areas under Hong Kong law and nobody is allowed to enter the area

The Chinese army garrisoned in Hong Kong has warned people searching for Pikachu and other virtual monsters to stay off their premises, as Pokemon Go mania sweeps the smartphone-obsessed city.

The gaming app landed Monday in Hong Kong and saw residents more glued to their phones than ever, searching for the cyber creatures in locations ranging from shopping malls to the government headquarters.

The app uses satellite locations, graphics and camera capabilities to overlay cartoon monsters on real-world settings, challenging players to capture and train the creatures for battles.

But the city's enthusiasm to "catch 'em all" has prompted warnings from government departments and even the Chinese People's Liberation Army to stay off their property.

A PLA spokesman told AFP the city's barracks were closed zones.

"Military barracks are restricted areas under Hong Kong law. Without the authorisation of the commanding officer, no one is allowed to enter the restricted areas," he said.

"Police report rooms are for people in need of police services, players are not allowed to play the game there, be a smart player!" the video added.

The app has now been launched in more than 40 countries including the US, Japan and much of Europe. Japanese video game company Nintendo started the mythical creature franchise 20 years ago.

However, widespread warnings have been given by authorities around the world after reports of players being injured or becoming the victims of crime.

Some Pokemon Go players were robbed after being lured to isolated locations in the hopes of catching the virtual creatures, according to US reports. Other distracted players have been blamed for causing traffic accidents.

In Indonesia, a French player was stopped and questioned for several hours after the app led him into a military base.

Two youngsters were so preoccupied with catching the cartoon monsters that they wandered across the US-Canada border.